Manual fuel primer pump for rapid priming of the fuel line in outboard and small gasoline engines. It incorporates double check valves for smooth flow and prevention of fuel backflow. Suitable for unleaded/lead gasoline and ethanol blends (e.g., E10). It is installed between the tank and the engine, following the flow arrow on the body.

Features:

• Quick fuel system priming – ideal after changing filters/hoses.
• Double check valve: one-way flow, no “backflows.”
• Fuel & alcohol-resistant rubber casing.
• Compatible with common fuel fittings/hoses.
• Blister packaging for shelf protection.

Codes & dimensions:

• 10.654 → Small 5/16"
• 10.655 → Large 5/16"
• 10.656 → Large 3/8"

Installation tip: Connect the primer pump with the arrow pointing towards the engine and press until it “locks.” Periodically check for hose/fitting wear.